15-0-Optoelectronics-固体光电子

1、,Optoelectronics光电子学,College of Optoelectronic Engineering, Nanjing University of Posts Todays optical telecommunications, display and illumination technologies rely heavily on optoelectronic components: laser diodes, light emitting diodes, liquid crystal and plasma screen displays etc.; Optoelectro

2、nics is in virtually every home and business office.,Branches in optoelectronics (光电子产业),Optical equipment (光学器材产业),Laser and its applications (激光器与激光应用),Optoelectronics devices,LED: light-emitting diode,LED,Laser,Visible semiconductor laser,Laser-guided advanced weapon,Photovoltaic devices (光伏器件),H

3、ondas two seated Dream car is powered by photovoltaics. The Honda Dream was first to finish 3,010 km in four days in the World Solar Challenge.,Optical to electrical energy conversion,Silicon solar cells on a house roof,Optical imaging：scientific cameras,Optical imaging / Data storage,Data storage,O

4、ptical communications,Global optical communication networks,Optoelectronic devices,PIN , APD,LD,Major elements of an optical fiber link,Optical transmitter,Electronical input signal,Optical fiber,Optical receiver,Electronical signal output,Regenerator,Optical transmitter,light source, optical modula

5、tor, ,photodetector, amplifier, signal restorer,The development of optoelectronic devices,First generation:,Second generation:,Third generation：,Forth generation:,GaAlAs LED and LD / Si-PIN and Si-APD , short distance , slow speed,InGaAsP LED and LD / Ge-APD and InGaAs-PIN,InGaAsP single mode LD / I

6、nGaAs-PIN , APD band width long distance,DFB LD （分布反馈式激光器）/ InGaAs PIN-FET etc,Fifth generation:,QW LD （量子激光器）,Topic I. Function demands of optoelectronic devices :,Information reception /detection检测,Information transfer传输,Information generation产生,Information display显示,Information manipulation 处理,Hi

7、gh gain,Topic II. Requirements of a useful device,Non-linear response,Topic III. The advantage of optoelectronic devices,The disadvantage of electronic devices,metallic inter-connects limit the inter-connectivity of the devices;,difficult to transmit information over very long distances,external ele

8、ctromagnetic interference (EMI) effects,charged particles scattering process,Special features of optoelectronic devices which make optics an attractive medium for information processing,Optoelectronic devices; laser diodes; light emitting diodes; detectors; modulators,Some areas where optoelectronic

9、s has made impacts in modern technology,Optical devices based on novel physical phenomenon; quantum stark effect; non-linear effects,Massive memory chips ( bits),Free space beam steering,Areas where optoelectronic systems are expected to make an impact in the future,The trend for optoelectronics dev

10、elopment:,(a) high response speed,(b) Wavelength division multiplexing technology ( WDM 波分复用 ),(d) Optoelectronic integrated technology (光电集成技术),Electromagnetic spectrum,Frequency,Sonic,Ultrasonic,AM broadcast,FM radio/TV,Radar,Infrared light,Visible light,Ultraviolet,X-rays,Wavelength,1 kHz,1 MHz,1

11、 GHz,1 THz,1 EHz,1 PHz,c =f l / n c:Speed of light ( 2 997 924 58 m/s ) f:Frequency l:Wavelength n:Refractive index (vacuum: 1; standard air: 1.0003; silica fiber: 1.44 to 1.48),Basic concepts,Lightwave transmission bands,Near Infrared,Frequency,Wavelength,1.6,229,1.0,0.8,m,0.6,0.4,1.8,1.4,UV,(vacuu

12、m),1.2,THz,193,461,0.2,353,Longhaul telecom Regional telecom Local area networks,850 nm,1550 nm,1310 nm,CD Players 780 nm,HeNe Lasers 633 nm,Basic concepts,Optical fiber transmission,0 dBm= 1 mW 3 dBm= 2 mW 5 dBm= 3 mW 10 dBm= 10 mW 20 dBm= 100 mW -3 dBm= 0.5 mW -10 dBm= 100 W -30 dBm= 1 W -60 dBm=

13、1 nW,0 dB= 1 + 0.1 dB= 1.023 (+2.3%) + 3 dB= 2 + 5 dB = 3 + 10 dB= 10 -3 dB= 0.5 -10 dB= 0.1 -20 dB= 0.01 -30 dB= 0.001,dB= 10 log10 (P1 / P0),dBm = 10 log10 (P / 1 mW),The logarithmic scale,Basic concepts,Key Topics,II. Requirements of a useful device,I. Function demands of optoelectronic devices,III. The disadvantage of elect